Answer:
Step-by-step explanation:
y=-3x²-4x+7...(*)
3x+2y=18...(**)
use (*) put the value of y in (**) :
3x +2(-3x²-4x+7)=18
3x-6x²-8x +14 -18 = 0
-6x²-5x- 4 = 0
6x²+5x+4 = 0
delta = b² - 4ac a = 6 b=5 c =4
delta = 5² - 4(6)(4)= 25 -96= -71 negatif
so no reals solution
1500 × 5% = amount of tax
1500 × .05 = 75
add the 75 tax to the original amount
1500 + 75 = $1575 total after
taxes
Answer:
23
Step-by-step explanation:
Answer:
sorry im not smart lol
Step-by-step explanation:
1)-3=z+4
z=-4-3=-7
answer is C
2)z-4=-8
z=-8+4=-4
answer is C
3)6.4=4x
4x=6.4/4
x=1.6
answer is B
4)-9=r/4
r=-9×4=-36
answer is D
5)-9=3/8n
n=-9×3/8
n=-24
answer is A, I guess, because there are two = signs, so perhaps this is a mistake and there should be - instead of =